Johannes heinrich friedrich gorges



' (No Model.) .J.H. F. GRGBS.'

INGANDESGENT LAMP.

No. 487,049. Patentd Nov.2`9, 1892.

I I I. 6x. r v mvg/gro @1% -fmw y NIT-ED STATES PATENT OFFICE.

JOHANNES HEINRICH FRIEDRICH GRGES, OF BERLIN, GERMANY, ASSIGNOR TO SIEMENS do HALSKE, OF SAME PLACE.

INCANDESCENT LAM P.

SPECIFICATION forming part of Letters Patent No. 487,049, dated November 29, 1892.

Application led April 20,1892. Serial No. 429,834. (No model.) Patented in Germany April 7, 1891, No. 59,622; in France ,Tune 16, 1891, No. 214,178; in Italy June 17, 1891, XXV, 29,910, LVIII, 440; in Belgium June 17, 1891, No. 95,304; in Sweden Jime18,1891, No. 3,411; in Norway .Tune 18,1891, No. 2,354; in Austria-Hungary June 20, 1891, No. 29,623 and No.

55,065, and in Switzerland .Tune 24:, 1891,11'0l 3,632.

To a/ZZ whom it may concern.-

Be it known that I, JOHANNES HEINRICH FRIEDRICH GRcns, a subject of the Emperor of Germany, residing at Berlin, Prussia, German Empire, have invented a new and useful Improvement in Electric Lamps,(for which I have obtained Letters Patent in Germany on April 7, 1891, No. 59,622; in France on June 16, 1891, No. 214,178; in Italy on June 17, 1891,

ro XXV, 29,910, LVIII, 440; in Belgium on June 17, 1891, No. 95,304; in Switzerland on June 24, 1891, No. 3,632; in Sweden on June 18,

1891, No. 3,411; in Norway on June 18, 1891,

No. 2,354; in Austria, No. 29,623, tom. 41, fol.

3,640, and in Hungary on AJune 20, 1891, No.

55,065, tom. 25, fol. 3,574,) of which the following is a specification.

My invention relates to an electric incandescent lamp adapted for use in systems emzo ploying a multiphase or rotary current.

My invention consists of a lamp constructed and operating substantially as hereinafter described and set forth.

The object of my invention is the construc- 2 5 tion of an incandescent lamp in such a manner that the currents from all of the conductors to which it is connected shall simultaneously act thereon.

In the accompanying drawings, which illus- 3o trate my invention, similar letters of reference indicate like parts.

Figure 1 shows a lamp provided with three loop filaments suitably connected to three terminals. Fig. 2 is a plan View of Fig. 1.

3 5 Fig. 3 shows a lamp provided with three filaments connected together at one end and at their opposite ends to three terminals. Fig. 4 is a plan view of Fig. 3.

In the drawings, A represents a glass globe 4o constructed in the usual manner and from which the air has been exhausted, B the base, and ct b o the terminals or conductors through which the lamp is connected with the current-conveying conductors of the system with which the lamp' is to be used. Within the lamp are the carbon filaments a b c. The carbon filaments may be connected together in various ways and yet insure the connection of the terminals through equal resistances.

In Figs. 1 and 2 each two of the three terminals are shown connected by a carbon loop filament.

In Figs. 3 and 4 the carbon filament comprises three limbs connected together at a point O, the other three ends being connected to the three terminals.

It will be evident that the arrangement of the carbon iilaments is capable of being variously modified, While still maintaining the essential features of my invention-t'. e.,connecting the terminals through equal resistances.

I have described my invention as carried out in a lamp adapted for use with a multiphase system wherein three alternating currents are employed, Whose phases are displaced relatively to each other to the extent of an angle of one hundred and twentyvdegrecs; but it will be understood that I may construct a lamp having more than three terminals connected within the lamp through equal resistances. It will be seen that when a lamp so constructed is used in a multiphase system as the terminals (and what is the same thing, the conductors ofthe system) are connected through equal resistances there will be no difference of load in the conductor, and the current from all of the conductors will simultaneously act through thelamp, and, further, that the independence of such lamps is insured. l

Having thus described my invention, I claim- 1. An incandescent lamp provided with three terminals connected with each other through three independent carbon filaments of equal resistance.

2. An incandescent lamp provided with an uneven number of terminals and an equal number of carbon filaments of equal resistance, connected to said terminals in multiple in pairs and with each other in multiple series.

3. An incandescent lamp provided with a plurality of independent carbon lannentsfof each other within the' larn p by connecting I0 equal Iesista'ne'e' and a pluralityl ofJ terminals ea'ehtwo ot' the terminalsA byfa filament equal in number to the filaments and con-I Intestimonywhereoflafx my signature in nected With each other through said tilam ents. the presence of two Witnesses. 5 4' A Incandescent lamp PfOVded Wth a JOHANNES HEINRICH FRIEDRICH GEGEs.

plurality of carbon filaments of loop form,

having two ends and of equal-resstanee,-a- Witnesses:

plurality of terminals equal in number to the EMIL KOLLINER,l ilainents, and said terminals connected with JOHN B. JACKSON. 

